Adkinson/Plummer/Odom

I found the following information on the 1850 census of Darlington County in South Carolina.

Thomas Adkinson age 50 Milley Adkinson age 40 John Plummerage 22 Martha E. "age 18 Thomas A. "age4 Charles"age2 John A."age 1/12 Ann Odom........age 93 The census stated that all of these people were from North Carolina. I am working on Odoms, Plummers, and their relatives in Darlington County. Was this John Plummer married to the daughter of Thomas Adkinson? Who was this Ann Odom? Any help is appreciated. Susan